<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>请求、响应</title>
		<style type="text/html">
			.warpper{
				border: 0ch;
			}
		</style>
	</head>
	<body>
		<form class="warpper" action="/core/sign/in" method="post">
			<input type="text" name="username" placeholder="请输入用户名">
			<input type="password" name="password" placeholder="请输入密码">
			<input type="submit" value="登录">
		</form>
	</body>
</html>